TownSteel MSS Series Heavy Dut...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$615.00
$610.62
TownSteel TownSteel MSS Series Intruder Deadbolt Function - Heavy Duty Sectional Mortise Lock , Double Cylinder TWS-MSS-33

TownSteel MSS Series Heavy Duty Double Cylinder Mortise Lock with Intruder Deadbolt Function

(No reviews yet) Write a Review

Model: MSS-R-T-33-626
$615.00
$610.62
Selected Finish is
Selected Lever Types is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$615.00
$610.62
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

TownSteel MSS Series Heavy Duty Double Cylinder Mortise Lock with Intruder Deadbolt Function

The TownSteel MSS Series Double Cylinder Mortise Lock is an ANSI Grade 1 heavy duty sectional mortise lock with an Intruder deadbolt function, suited for single-opening, stand-alone door security or integration into sophisticated access control systems. It features a 2-3/4" backset, a 3/4" projection stainless steel split anti-friction latch bolt, and a stainless steel ANSI strike for commercial-grade durability. The lock is backed by a 2-year manufacturer's warranty and supports optional REX, PRIV, DAJ, and MKO status sensors.

Key Features

  • Backset: 2-3/4" backset provides standard sectional mortise lock compatibility for commercial door preparations.
  • Latch Bolt: 3/4" projection stainless steel split anti-friction latch bolt delivers smooth, reliable operation.
  • Faceplate: 1-1/4" x 8" stainless steel faceplate for durable, corrosion-resistant performance.
  • Escutcheon: 10-9/16" x 2-3/8" x 9/32" brass escutcheon for a refined commercial appearance.
  • Strike: ANSI strike, plated stainless steel, for secure and durable frame engagement.
  • Access Control Ready: Optional REX (request-to-exit), PRIV (privacy), DAJ (door ajar), and MKO (mechanical key override) status sensors for access control integration.
  • Manufacturer Warranty: Backed by a 2-year manufacturer's warranty for added confidence and protection.

Certifications & Compliance

  • ANSI Grade 1 Heavy Duty Mortise Lock
  • 2-Year Manufacturer's Warranty

Technical Specifications

  • Series: MSE Series
  • Product Group: Mechanical Locks
  • Product Subgroup: Mortise Locks and Trim
  • Product Type: Mortise Locks
  • Subcategory: Mortise Locks
  • Keyed Function: Double Cylinder
  • Commercial/Residential: Commercial
  • Keyed: Yes
  • Lock Function: Double Cylinder
  • Product Attribute: Mortise Locks
  • Electronic: No
  • Product Function: Intruder
  • Product Category: Mechanical Locks
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why TownSteel MSS?

TownSteel MSS Series mortise locks deliver professional-grade reliability with stainless steel latch bolts and strikes, combined with forged brass/cast zinc lever construction rated to ANSI Grade 1 heavy duty standards. Engineered for demanding commercial applications requiring dependable double cylinder security and intruder deadbolt protection, the MSS Series is suited for both stand-alone installations and integration into advanced access control systems.

Product Specs

Series:
MSE Series
Product Group:
Mechanical Locks
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Subcategory:
Mortise Locks
Keyed Function:
Double Cylinder
Commercial/Residential:
Commercial
Lock Type:
Mortise
Keyed:
Yes
Lock Function:
Double Cylinder
Grade:
Grade 1
Duty Level:
Heavy Duty
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Intruder
Product Category:
Mechanical Locks
Department:
Door Hardware

TownSteel MSS-R-T-33-626 – Frequently Asked Questions

1) What does the intruder function on the TownSteel MSS mortise lock actually do at the door?
The MSS intruder deadbolt function is a double cylinder setup, so the deadbolt is thrown or retracted by key from either side of the door. Teachers or staff can lock down from inside the room with a key without stepping into the corridor. Because both sides are keyed, anyone inside needs a key to retract the deadbolt, which is the tradeoff to check against your local egress requirements before specifying it.
2) Do I have to specify handing when ordering this TownSteel mortise lock?
Handing is required. You pick LH, RH, LHR or RHR at the time of order. Reverse handing (LHR/RHR) is the one to use on outswing doors. Get it wrong and the lever and anti-friction latch will be oriented backwards for the opening.
3) Can I get these mortise locks keyed alike across a building?
Yes. Keying is a required selection: keyed different is the standard, keyed alike is available when you want one key running multiple locks, and you can submit a specific key code for special keying. Property managers standardizing a floor or a wing usually take keyed alike; a key code order lets the locks join an existing master system.
4) Does the MSS mortise lock take small format interchangeable cores?
It can. The cylinder choice is either standard cylinder or SFIC prep less core. The SFIC version arrives prepped but without cores, so a locksmith supplies cores in the facility's existing SFIC keyway. If you are not running an SFIC system, order standard.
5) What is the closest mechanical equivalent to the TownSteel MSS Series intruder mortise lock from another manufacturer?
The BEST 45HCA series heavy duty mortise lockbody is also built as an intruder function heavy duty mortise lock, making it the nearest match in function and duty level to the TownSteel MSS intruder deadbolt function lock. The TownSteel MSS is a Grade 1 sectional trim lock offered with eight lever styles including Artistic, Gala, Imperial, Quest, Regal, Sentinel and Tango, so if the lever design on the opening matters the MSS gives more trim choice.
6) I only need a double cylinder deadbolt, not a full lockset with levers. What should I use instead?
The Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset, which covers the deadbolt-only opening without any lever trim. The TownSteel MSS intruder lock is a complete double cylinder mortise lockset with sectional escutcheon trim and lever, so choose it when the door needs latching and lever operation as well as the bolt.
7) The opening is a classroom, not an intruder-function door. What Grade 1 mortise lock fits that instead?
For classroom function, the Cal-Royal NM8070 and the Corbin Russwin ML2003 are both Grade 1 mortise classroom locksets, and the ML2003 is listed for 1-3/4 inch doors. The TownSteel MSS Series is built as an intruder deadbolt function lock, which is a different keyed arrangement than classroom.
8) Is the TownSteel MSS a drop-in for a Baldwin 6301 or 6310 mortise lock body?
No. The Baldwin 6301 entry/apartment and 6310 entry/storeroom mortise lock bodies use a 2-1/2 inch backset, while the TownSteel MSS Series is a 2-3/4 inch backset lock, so the mortise pocket and cylinder centerline will not line up without new prep.
9) What latch and strike does the MSS use, and will it latch reliably on a door with a gasketed frame?
The latchbolt is stainless steel, split, anti-friction, with 3/4 inch projection, and there is a stainless guard bolt to deadlock it. The 3/4 inch throw into an ANSI strike gives you working engagement on a door that a gasket or closer is pushing back on, and the anti-friction design reduces drag when the latch rubs the strike lip on a slightly out of square frame.
10) Is this mortise lock heavy enough for a school or high traffic commercial corridor?
It is ANSI Grade 1, heavy duty, and specified as commercial. Grade 1 is the top ANSI/BHMA durability tier for mortise locks and is what institutional specs normally call for on classroom, corridor and main entry doors.
11) What trim choices come with the TownSteel MSS sectional mortise lock?
Sectional trim, with the escutcheon offered in MSE low or MSE regular. Eight lever designs are available: Artistic, Congr, Gala, Imperial, Quest, Regal, Sentinel and Tango, in forged brass or cast zinc plated to match the finish. Finishes run 605 bright brass, 606 satin brass, 622 matte black, 625 bright chrome, 626 satin chrome, 629 bright stainless and 630 satin stainless. The thumbturn is brass, Classic Visible as standard, and stop works are stainless rocker type.
12) I need a mortise lock for an access control system, not a mechanical intruder lock. What should I look at instead?
The MSS is a mechanical lock, not electronic, so it does not tie into a credential reader on its own. For electrified openings, ZenSupply carries the Schlage L9092EU with electric lock/unlock outside lever and request-to-exit at 12/24VDC, the BEST 45HW wired electromechanical mortise lock at 12V/24V, and the Command Access ML190 motorized mortise lock with field selectable EL/EU operation on 24VDC. For standalone keypad instead of wired, look at the BEST 45HZ EZ Series or the Alarm Lock DL3500CR.
13) What is the closest alternative to the TownSteel MSS intruder lock from another brand?
The BEST 45HCA Series heavy duty mortise lockbody is also an intruder function heavy duty unit, which is the nearest match on function. If you only need a keyed deadbolt without a latch and lever, the Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset, the same backset the MSS uses. For a classroom security indicator approach rather than an intruder function, the Marks USA LA318GJ is a Grade 1 mortise lockset for 1-3/4 inch doors with an ANSI strike.
14) Is the Alarm Lock DL4500 a substitute for the TownSteel MSS intruder deadbolt lock?
They are not interchangeable. The Alarm Lock DL4500 is a Grade 1 electronic mortise deadbolt with a keypad and 2,000 user codes for doors 1-5/8 to 1-7/8 inch thick. The TownSteel MSS Series is a non-electronic keyed mechanical lock, so pick the DL4500 only if you want code-based access rather than keys.
15) We want to standardize a facility on one mortise platform but need storeroom doors too. What pairs with the TownSteel MSS?
For storeroom openings, the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset with an interchangeable core option. The TownSteel MSS intruder lock is also Grade 1 and can be ordered SFIC prep less core, so an SFIC-keyed facility can carry both on the same core system.
16) What is a simpler non-keyed mortise lock if the door does not need a cylinder at all?
The Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Falcon MA101 is a Grade 1 heavy duty mortise passage lock that is field reversible and fire rated. The TownSteel MSS Series is a keyed double cylinder lock, so it is the choice only where the opening needs key control on both sides.
17) How does the TownSteel MSS compare with the Hager 3800 Series escutcheon mortise locks?
Both use escutcheon trim, but the functions differ: the Hager 3810E is a Grade 1 passage mortise lock and the 3850E is an office function non-keyed lock, both on a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inch. The TownSteel MSS is a keyed double cylinder intruder function lock, also on a 2-3/4 inch backset, with a choice of MSE low or regular escutcheon.
18) We need access control on this opening. What electrified mortise lock replaces the TownSteel MSS?
The Command Access ML190 Series is a heavy-duty motorized storeroom function mortise lock with field selectable EL/EU operation on 24VDC, and the BEST 45HW is a heavy duty wired electromechanical mortise lock running 12V or 24V. The TownSteel MSS Series is a mechanical lock but supports optional status sensors such as REX, privacy, door ajar and mechanical key override for tying into an access control system.
19) Would a Marks USA 21AC or 22AC work in place of the TownSteel MSS double cylinder lock?
Both Marks USA 21AC and 22AC are entrance double cylinder ornamental iron mortise locks with a round knob, listed for 1 inch door thickness, so they suit narrow ornamental iron stiles. The TownSteel MSS is a heavy duty Grade 1 commercial mortise lock with a 1-1/4 by 8 inch stainless faceplate and lever trim, intended for standard commercial doors rather than 1 inch iron gates.
20) For a dormitory corridor door, is there a Grade 1 mortise alternative to the TownSteel MSS?
The Sargent 7925 is a Grade 1 heavy duty corridor/dormitory exit function mortise lock with rose trim and a single cylinder deadbolt. The TownSteel MSS intruder version is a double cylinder lock with sectional escutcheon trim, so the difference comes down to single versus double cylinder control of the bolt and rose versus escutcheon trim.
21) Is the MSS a lock body only, or a complete lockset?
It comes as a complete sectional lockset: lock body, sectional escutcheon trim, lever, thumbturn, stainless faceplate and ANSI strike. If you only need a replacement lock body to reuse existing trim, a body-only item such as the BEST 45H series lockbody is the different kind of purchase.
22) Can I mix finishes and lever styles across different doors and still keep the same lock?
Yes. The MSS lock body stays the same while you vary the trim: eight lever styles and seven finishes from bright brass through matte black and satin stainless, plus low or regular escutcheon height. That lets a property manager keep one lock function and one keying system across a building while matching finish to each area.
How fast can I get the TownSteel MSS-R-T-33-626 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the TownSteel MSS-R-T-33-626 come with a warranty?
Absolutely. The TownSteel MSS-R-T-33-626 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the TownSteel MSS-R-T-33-626?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the TownSteel MSS-R-T-33-626 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!